Search

Your search keyword '"B. Bantes"' showing total 2 results
Start Over Author "B. Bantes" Journal european physical journal a
2 results on '"B. Bantes"'

1. Photoproduction of omega mesons off protons and neutrons

Author

A. Süle, S. Höffgren, O. Bartholomy, M. Kotulla, Ankhi Roy, M. Konrad, Friedrich Klein, M. Ostrick, S. Schadmand, Matthew Lang, H. Dutz, M. Pfeiffer, J. C. S. Bacelar, V. Kleber, S. Shende, J. Junkersfeld, H. Schmieden, D. E. Bayadilov, V. Crede, H. Kalinowsky, R. Ewald, A. B. Gridnev, Mariana Nanova, I. Jaegle, A. V. Anisovich, Ch. Schmidt, T. Szczepanek, D. Menze, H. van Pee, S. Kammer, Frank Klein, R. Varma, F. Dietz, A. Wilson, I. V. Lopatin, T. Mertens, Herbert Löhner, U. Thoma, V. Shklyar, Ch. Wendel, Lalit Mohan Pant, Frank Frommberger, C. Funke, R. Beck, D. Walter, V. V. Sumachev, J. G. Messchendorp, R. W. Gothe, R. Castelijns, R. Gregor, D. Trnka, E. Gutz, V. Metag, B. Bantes, T. Rostomyan, V. A. Nikonov, I. Horn, S. Lugert, Eberhard Klempt, Y. A. Belogazov, D. Elsner, R. W. Novotny, Ph. Hoffmeister, B. Schoch, Wolfgang Hillert, B. Krusche, D. V. Novinski, and Research unit Nuclear & Hadron Physics

Subjects
Nuclear reaction, Physics, TAPS, Nuclear and High Energy Physics, Proton, Meson, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Nuclear Theory, WIDTH, Photon energy, DEUTERON, Nuclear physics, Deuterium, NUCLEAR MEDIUM, Neutron, High Energy Physics::Experiment, PHI-PHOTOPRODUCTION, SPECTROMETER, Atomic physics, Nucleon, Nuclear Experiment, MATTER
Abstract

Omega photoproduction off hydrogen and deuterium has been studied with the tagged photon beam of the ELSA accelerator in Bonn for photon energies up to 2.0 GeV. The omega meson has been identified via the omega -> pi(0) gamma -> gamma gamma gamma decay mode, using the combined setup of the Crystal Barrel/TAPS detector systems. Both inclusive and exclusive analyses have been carried out. Differential and total cross-sections have been derived for omega mesons produced off free protons and off protons and neutrons bound in deuterium. The cross-section for the production off the bound neutron is found to be a factor of a parts per thousand 1.3 larger than the one off the bound proton in the incident beam energy region 1.2 GeV

Published
2015
Full Text
View/download PDF

2. Quasi-free photoproduction of eta-mesons off the deuteron

Author

D. Walther, U. Thoma, V. Crede, F. Frommberger, D. V. Novinski, S. Schadmand, V. Sokhoyan, V. Metag, S. Lugert, S. Kammer, B. Krusche, L. M. Pant, Yu. A. Beloglazov, Wolfgang Hillert, Eberhard Klempt, J. C. S. Bacelar, R. Castelijns, R. W. Gothe, S. Höffgen, Lilian Witthauer, R. Ewald, Ch. Funke, D. Elsner, O. Bartholomy, R. W. Novotny, Ph. Hoffmeister, H. Kalinowsky, R. Gregor, A. V. Anisovich, Frank Klein, J. Junkersfeld, B. Schoch, E. Gutz, M. Dieterle, T. Mertens, D. Menze, Herbert Löhner, A. V. Sarantsev, H. Schmieden, M. Pfeiffer, D. E. Bayadilov, A. B. Gridnev, Mariana Nanova, A. Roy, D. Trnka, H. van Pee, Ch. Wendel, Friedrich Klein, T. Szczepanek, V. V. Sumachev, V. A. Nikonov, R. Beck, I. Horn, M. Kotulla, B. Bantes, M. Konrad, Matthew Lang, V. Kleber, I. Jaegle, F. Pheron, S. V. Shende, Yasser Maghrbi, H. Dutz, D. Werthmüller, I. Keshelashvili, I. V. Lopatin, J. G. Messchendorp, R. Varma, M. Oberle, A. Süle, Ch. Schmidt, M. Ostrick, KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Proton, Meson, Hadron, Nuclear Theory, NUCLEON RESONANCE, FOS: Physical sciences, Photon energy, PROTON, ELSA, REGION, Nuclear physics, Effective mass (solid-state physics), Neutron, Nuclear Experiment (nucl-ex), Nuclear Experiment, Physics, NEAR-THRESHOLD PHOTOPRODUCTION, CHIRAL DYNAMICS, EXCLUSIVE MEASUREMENT, POLARIZED PHOTON BEAMS, BARYON RESONANCES, ASYMMETRY, High Energy Physics::Experiment, Nucleon
Abstract

Precise data for quasi-free photoproduction of $\eta$ mesons off the deuteron have been measured at the Bonn ELSA accelerator with the combined Crystal Barrel/TAPS detector for incident photon energies up to 2.5 GeV. The $\eta$-mesons have been detected in coincidence with recoil protons and neutrons. Possible nuclear effects like Fermi motion and re-scattering can be studied via a comparison of the quasi-free reaction off the bound proton to $\eta$-production off the free proton. No significant effects beyond the folding of the free cross section with the momentum distribution of the bound protons have been found. These Fermi motion effects can be removed by an analysis using the invariant mass of the $\eta$-nucleon pairs reconstructed from the final state four-momenta of the particles. The total cross section for quasi-free $\eta$-photoproduction off the neutron reveals even without correction for Fermi motion a pronounced bump-like structure around 1 GeV of incident photon energy, which is not observed for the proton. This structure is even narrower in the invariant mass spectrum of the $\eta$-neutron pairs. Position and width of the peak in the invariant mass spectrum are $W\approx 1665$ MeV and FWHM $\Gamma\approx 25$ MeV. The data are compared to the results of different models., Comment: accepted for publication in Eur. Phys. J. A

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results